Type-writing machine.



F. A. ROBINSON.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE 10, 1912.

Patented Oct. 14, 1913.

UNITE STATES PATENT @FFIQE.

FRANK e. ROBINSON, on NEW Yon-K, N. Y ASSIGNOB. 'ro unnnnwoon rvrnwnirna COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

To all whom it may concern:

Be it known that I, FRANK A. RonIN- soN, a citizen of the United States, residing in borough of Brooklyn, city of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in T ype-Writing Machines, of which the following is a specification.

Myjnvention relates to typewriting niachines, and particularly tomeans for feeding a work-sheet around the platen ofa typewriter. I

The paper or other -work-sheet is provided with perforations along its edge spaced at uniform intervals, and on one or both ends of the platen, studs are provided spaced at corresponding intervals, and arranged to enter said perforations and positively aline the work-sheet as it is fed around the platen. The row'of studs on the end of the platen preferably extends only part way around it, so that the work-sheet may be in:

,serted when the platen is properly placed without interference from any of the studs. A stop is preferably provided arresting the platen at the most'convenient point for inserting the paper free from interference from said studs; and guides, such as envelop guides, may be arranged to hold the work sheet so that as it travels around the platen, it is always engaged by at least two studs,

and therefore is held positively alined by said studs. 1

Other features and advantages will here partly sectional showing the end of the platen and its stop. Y

On the frame 1 of an Underwood typewriting machine, a carriage 2 travels in the usual manner, said carriage comprising the usual platen frame having ends 3 and 4, on which ends a. platen 5 is journaled. Said platen may be rotated by hand wheel 6 to feed a work-sheet 7 around it, said work-sheet being-- first placed on a paper table 8 and moved Specification of Letters Patent.

Patented Oct. 114, 19113..

Application filed June 10, 1912. Serial No. 702,682.

by hand forwardly. around underthe platen until 1t comes over the pins or studs 9 which have been placed in the position seen in Fig.

4. In this position there are no studs to interfere with the work-sheet as it passes under the platen. Also in this position the conical pins or studs '9, which are fast on the platen, are in sight, and said work-sheet 7 may be easily adjusted on the platen so that its perforations register with said studs 9 and positively aline thesheet. When so alined guides 11 and rear envelop guides 12 may be swung so as to hold said work-sheet close around the platen, so that the work-sheet will always engage at least/two of said studs 9. In addition to the hand wheel 6, the platen may be rotated by the usual linespace lever 13 working through a slide 14, to drive a linespace wheel 15, fast on the axle 16 of said platen, and-the throw of said line-space wheel may be regulated by a finger-piece 15 The platen is positively brought to rest in the position shown in Fig. 4 which is the most desirable position for inserting a work-sheet, by means of a spring-operated stop 17 adapted to enter an opening 18 in said platen and to positively lock said platen when rotated in reversed direction. A cam face 19 on said stop permits the platen to rotate freely in line-spacing direction and a handle 20 on said stop is arranged to move it to inoperative position whenever it is desired to reverse the rotation of the platen. The paper table 8, where it becomes a paper guide 21 close against the platen, may be cut away at 22 to permit the studs 9 to pass, and the usual pressure rolls 23 may be provided to assist the paper in its feed around the platen.

It will be observed that on each end of the platen there are only six of the studs 9, and these are all on about one-third of the circumference of the platen. The guides 11 and 12 are preferably so arranged to hold the work-sheet against enough of the circumference of the platen, so that at least two studs on one end will at all times be engaged with their perforations in the work-sheet.

This insures that if the work-sheet engages K platen is arreste tates the platen to bring the studs to the accessible Fig. 4 osition, at which point the effective only once in every revolution of the platen. The operator then swings aside the paper guides 12 at the introductory side of the platen; which aresimilar to the members 11, usually employed in the Underwood ma- *chine to run on the delivery side of the platen, for assisting in feedihg envelops around the platen. The operator then inserts the work-sheet between the platen and the paper shelf 8; the sheet passing down around the under side of the platen between the same and the paper guide 21, and then up in front thereof, where it passes beneath the paper guide 11; and the perforations 10 are caught upon some of the foremost studs 9. The operator then swings the guides 12 to effective positions, Fig. 1, and then may release the detent 17 and proceed to rotate the platen in the usual manner for advancing the work-sheet line by line.

It will be seen that the rolls carried on the ends of the guides 11 and 12 are so near each other, that they hold the work-sheet wrapped around the platen for nearly the entire circumference of the platen, or at least sufliciently to cause some of the sheet perforations 10 to be always caught upon the studs 9. The operator may proceed to re- Volve the platen during the writing, until the sheet is run bif from the platen; or at any time, he may rotate the platen to the Fig. 4 position and swing aside the guides 11, 12, and sheet.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used wlthout others.

Having thus described my invention, I claim:

1. In the aper feed mechanism of a typewriting mac ine, a rotatable platen having work-carrying studs thereon arranged at uniform intervals to engage similarly arranged perforations in a work sheet, said 'withdraw the partly written studs being placed in an arc'extending part way only, around the platen, whereby a part of the circumference of the platen is left unobstructed for the free insertion of a work sheet.

2. In thepaper feed mechanism of a typewriting machine, the combination of a rotatable platen having work-carrying studs thereon arranged at uniform intervals to by the stop 17, which is tion of the work sheet, and means to hold the work sheetagainst the platen for a sufficient portion ofthe circumference thereof to be always engaged by said studs.

3. In the paper feed mechanism of a typewriting machine, the combination of the rotatable platen having work-carrying studs thereon arranged at uniform intervals to engage similarly arranged perforations in a work sheet, said studs being placed in an are extending less than half the way around the platen, whereby the greater part of the circumference of the platen is left unobstructed for the free insertion of a work sheet, and releasable means to hold the work sheet against the platen for a sufficient portion of the circumference thereof to'be always engaged by the studs.

4. In the paper feed mechanism of a typewriting machine, a rotatable platen having two rows of work-carrying" studs thereon arranged at uniform intervals to engage similarly arranged perforations in a work sheet, said studs being laced in parallel arcs extending part way on around the platen, whereby a part of the circumference of the platen is left unobstructed for the free in sertion of a work sheet.

5. In the paper feed mechanism of a typewriting machine, the combination of a rotatable platen having work-carrying studsthereon arranged at uniform intervals to engage similarly arranged perforations in a work sheet, said studs being placed in an are extending part way only, around the platen, whereby a part of the circumference of the platen is left unobstructed for the free insertion of a worksheet, and a stop for arresting said platen when said studs are in accessible position, so that a work sheet may be caught upon them.

6. In a typewriting machine, the combination with a rotatable platen, of a row of equally spaced studs around less than half of thecircumference of said platen, a paper guide close to said platen and having a portion cutaway to permit said studs .to pass, and a stop for arresting said platen when the part of said platen free from said studs is adjacent said pa er guide.v J 7. In the paper f ed mechanism of a typewriting machine, the combination with a rotatable platen, of a group of spaced studs on the circumference of said platen, saidgroup occupying less than one-half of the circumference of said platen, whereby a perforated work sheet may be readily adjusted upon the unoccupied arc of the platen into engagement with some one or more of the studs and means to hold said sheet in such engagement during any desired arc of revolution of the platen.

8. In the paper feed mechanism of a typewriting machine, the combination with a rotatable platen, of. a group of spaced studs on an arc of the circumference thereof, and arranged to enter perforations in a worksheet, said group occupying less than half of said circumference,'and guides arranged to hold a work-sheet against so much of said platen that said sheet always engages with a P writing machine, the combination with a rotatable platen, of a group ofspacedstuds on a circumference thereof, and arranged to enter perforations in a work-sheet, said group occupying less than half of said circumference, and guides movable out of the path of said work-sheet but arranged to be shifted to hold said work-sheet wrapped around said platen sufficiently to always engage a pin. a

10. In the paper feed mechanism of a typewriting machine, the combination with a rotatable platen, of a group of studs arranged in an are part way around said platen to engage a work-sheet, a paper guide close against one side of said platen, a spring operated stop arranged to arrest said platen in its backward rotation when said non-engaging part is adjacent said guide, and a handle for throwing said stop to inoperative position.

11. The combination with a revoluble platen, of a series of work-carrying studs projecting from its periphery at each end thereof, one series beingopposite the other, and each series extending around less than half the circumference of the platen, whereby a work sheet may be adjusted past the unobstructed part into engagement with one or more of the studs, and means to hold the work-sheet wrapped sufficiently far around the platen to insure it always being caught upon the studs.

12. The combination with a revoluble platen, of aseries of work-carrying studsv projecting from its periphery at each end thereof, one series being opposite the other, and each series extending around less than half the circumference of the platen, where-- by a work sheet may be adjusted past the unobstructed part into engagement with one or more of the studs, and means to hold'the work-sheet wrapped suificiently far around the platen to insureit always being caught upon the studs; said sheet-holding means comprising both a paper-guiding device at the introductory side of the platen and a paper guiding device at the delivery side of the platen.

13. The combination with a revoluble platen, of a series of work-carrylng studs projecting from its periphery at each end 111. 9. In the paper feed mechanism of a typej thereof, one series being opposite the other, and each series extending around lessthan half the circumference of the platen, whereby a work sheet may be adjusted past the unobstructed part into engagement with one or more of the studs, means to hold the work-sheet wrapped sufficiently far around the platen to insure it always being caught upon the studs, and means for arresting said platen at such a position thereof, that the sheet being introduced around the platen may clear the studs.

14. The combination with a revoluble platen, of a row of work-carrying studs extending partly around the circumference thereof, said row sometimes accessible and sometimes inaccessible for the insertion of a work sheet during the rotation of the platen, and means to cause a work-sheet to be caught upon said studs to be carried continuously thereby during successive revolutions of the platen in the same direction.

15. The combination with a revoluble platen, of two rows of work-carrying studs extending partly around the circumference thereof at its opposite ends, said rows sometimes accessible for the insertion of a work sheet and sometimes inaccessible during the rotation of the platen, and means to cause a work-sheet to always be caught upon the studs in both rows to be carried thereby.

16. The combination with a revolubleplaten, of a row of work-carrying studs extending partly around the circumference thereof, said row sometimes accessible and sometimes inaccessible for the insertion of a work sheet during the rotation of the platen, means to cause a work-sheet to be caught upon said studs to be carried continuously thereby during successive revolutions of the platen in the same direction, and means to cotiperate with said studs to hold a worksheet thereon so that the sheet will always be caught by the studs.

17. The combination with a revoluble platen, of a row of work-carrying studs extending partly around the circumference thereof, said row sometimes accessible and sometimes inaccessible for the insertion of a work sheet during the rotation of the platen, means to cause a work-sheet to be caught upon said studs to be carried continuously thereby during successive revolutions of the platen in the same direction, and means to cooperate with said studs to hold a work-sheet thereon so that the sheet will. always be caught by the studs; said means being releasable to permit the insertion and withdrawal of the work-sheet.

18. The combination with a revoluble platen, of a row of work-carrying studs extending partly around the circumference thereof, said row sometimes accessible and sometimes inaccessible for the insertion 'of a work sheet duringthe rotation of the platen,

means permitting a Work-sheet to be caught drawal of the Work-sheet, and a speciel a1- upon said studs to be carried continuously resting device for the platen efiective only 10 thereby during successive revolutions of the When the studs are in accessible positions.

platen in the same direction, means to co- FRANK A. ROBINSON;

' operate with said studs to hold a WOIk-Sl16Bt thereon so that the sheet will alwaysbe Witnesses: caught by the studs; said means being re- F. E. ALEXANDER,

'leasable to permit the insertion and With-, JULIUS DUCKSTINE. 

